PowerToys/Directory.Build.targets

<Project>
  <Sdk Name="Microsoft.Build.CopyOnWrite" Version="1.0.282" />

  <Import Project="$(MSBuildCachePackageRoot)\build\$(MSBuildCachePackageName).targets" Condition="'$(MSBuildCacheEnabled)' == 'true'" />
  <Import Project="$(MSBuildCacheSharedCompilationPackageRoot)\build\Microsoft.MSBuildCache.SharedCompilation.targets" Condition="'$(MSBuildCacheEnabled)' == 'true'" />

  <!--
    Onboarding guard: PowerToys has deeply nested source paths that exceed the legacy
    260-character MAX_PATH limit. Without Windows long path support enabled, the build
    fails with cryptic "path too long" / "could not find file" errors that are hard for
    new contributors to diagnose. Detect the missing registry setting up front and emit a
    clear, actionable error before the confusing failures occur.

    - Covers both Visual Studio (Ctrl+Shift+B) and the command-line build scripts.
    - Runs only during real builds (skips design-time/IntelliSense passes).
    - Bypass with /p:SkipLongPathsCheck=true if you know what you're doing.
    See tools\build\setup-dev-environment.ps1 to enable everything automatically.
  -->
  <Target Name="EnsureLongPathsEnabled"
          BeforeTargets="PrepareForBuild"
          Condition="'$(DesignTimeBuild)' != 'true' and '$(SkipLongPathsCheck)' != 'true' and '$(OS)' == 'Windows_NT'">
    <PropertyGroup>
      <_LongPathsEnabled>$([MSBuild]::GetRegistryValueFromView('HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem', 'LongPathsEnabled', null, RegistryView.Registry64))</_LongPathsEnabled>
    </PropertyGroup>
    <Error Condition="'$(_LongPathsEnabled)' != '1'"
           Code="PTLONGPATH"
           Text="Windows long path support is not enabled. PowerToys source paths exceed the 260-character MAX_PATH limit, so the build will fail with cryptic 'path too long' errors. Fix it by running (from an elevated PowerShell): .\tools\build\setup-dev-environment.ps1 -- or set HKLM\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled = 1 (DWORD) and restart Windows. To bypass this check, build with /p:SkipLongPathsCheck=true." />
  </Target>

  <!-- Override ManifestTool to the x64 host tool under WindowsSdkDir for all projects once the SDK path is known. -->
  <PropertyGroup Label="ManifestToolOverride">
    <ManifestTool Condition="Exists('$(WindowsSdkDir)bin\x64\mt.exe')">$(WindowsSdkDir)bin\x64\mt.exe</ManifestTool>
  </PropertyGroup>

  <!-- Auto-restore NuGet for native vcxproj (PackageReference) when building inside VS -->
  <Target Name="EnsureNuGetRestoreForVcxproj" BeforeTargets="PrepareForBuild" Condition="
            '$(BuildingInsideVisualStudio)' == 'true'
            and '$(DesignTimeBuild)' != 'true'
            and '$(RestoreInProgress)' != 'true'
            and '$(MSBuildProjectExtension)' == '.vcxproj'
            and '$(RestoreProjectStyle)' == 'PackageReference'
            and '$(MSBuildProjectExtensionsPath)' != ''
            and !Exists('$(MSBuildProjectExtensionsPath)project.assets.json')
          ">

    <Message Importance="normal" Text="NuGet assets missing for $(MSBuildProjectName); running Restore...; IntDir=$(IntDir); BaseIntermediateOutputPath=$(BaseIntermediateOutputPath)" />

    <MSBuild Projects="$(MSBuildProjectFullPath)" Targets="Restore" Properties="RestoreInProgress=true" BuildInParallel="false" />
  </Target>

  <PropertyGroup Condition="'$(IgnoreExperimentalWarnings)' == 'true'">
    <NoWarn>$(NoWarn);CS8305;SA1500;CA1852</NoWarn>
  </PropertyGroup>

  <!-- Skipped test projects when BuildTests=false: no-op build and remove references.
       This must be in targets (not props) so it runs AFTER the project file adds its items. -->
  <PropertyGroup Condition="'$(_IsSkippedTestProject)' == 'true'">
    <BuildDependsOn />
    <CoreBuildDependsOn />
    <RebuildDependsOn />
  </PropertyGroup>

  <!-- For C# projects: remove all items -->
  <ItemGroup Condition="'$(_IsSkippedTestProject)' == 'true' and '$(MSBuildProjectExtension)' == '.csproj'">
    <PackageReference Remove="@(PackageReference)" />
    <ProjectReference Remove="@(ProjectReference)" />
    <Reference Remove="@(Reference)" />
    <Compile Remove="@(Compile)" />
    <Content Remove="@(Content)" />
    <EmbeddedResource Remove="@(EmbeddedResource)" />
    <None Remove="@(None)" />
    <Using Remove="@(Using)" />
    <GlobalUsing Remove="@(GlobalUsing)" />
  </ItemGroup>

  <!-- For C++ projects (vcxproj): remove all compile/link items to prevent build -->
  <ItemGroup Condition="'$(_IsSkippedTestProject)' == 'true' and '$(MSBuildProjectExtension)' == '.vcxproj'">
    <ClCompile Remove="@(ClCompile)" />
    <ClInclude Remove="@(ClInclude)" />
    <Link Remove="@(Link)" />
    <Lib Remove="@(Lib)" />
    <ProjectReference Remove="@(ProjectReference)" />
    <None Remove="@(None)" />
    <ResourceCompile Remove="@(ResourceCompile)" />
    <Midl Remove="@(Midl)" />
  </ItemGroup>

  <!-- Note: For C++ skipped test projects, build is effectively skipped by removing all compile items above.
       We don't define empty Build/Rebuild/Clean targets here because MSBuild Target definitions with Condition
       on the Target element still override the default targets even when condition is false. -->

  <!-- Clean up unused VC++ runtime DLLs that CopyCppRuntimeToOutputDir copies from the full
       VCRedist tree (MFC, C++ AMP, OpenMP). No PowerToys binary links against these — verified
       with dumpbin /dependents across all installed binaries. -->
  <Target Name="RemoveUnusedVCRuntimeDlls"
          AfterTargets="Build"
          Condition="'$(CopyCppRuntimeToOutputDir)' == 'true' and '$(MSBuildProjectExtension)' == '.vcxproj'">
    <ItemGroup>
      <_UnusedVCRuntimeDlls Include="$(OutDir)mfc140*.dll" />
      <_UnusedVCRuntimeDlls Include="$(OutDir)mfcm140*.dll" />
      <_UnusedVCRuntimeDlls Include="$(OutDir)vcamp140*.dll" />
      <_UnusedVCRuntimeDlls Include="$(OutDir)vcomp140*.dll" />
    </ItemGroup>
    <Delete Files="@(_UnusedVCRuntimeDlls)" Condition="'@(_UnusedVCRuntimeDlls)' != ''" />
    <Message Importance="normal" Text="Cleaned up unused VC runtime DLLs: @(_UnusedVCRuntimeDlls)" Condition="'@(_UnusedVCRuntimeDlls)' != ''" />
  </Target>
</Project>